Drug use in 'Pulp Fiction' is used as a narrative device. It helps to define the characters. The use of drugs like cocaine by some characters gives them an edgy and unpredictable nature. It also ties in with the non - linear storytelling, as the drug - influenced states of the characters can create confusion and a sense of chaos, much like the overall tone of the movie.
Drug use drives some of the key plot points. For instance, when characters are high or on a drug - related mission, it leads to unexpected encounters and twists.
In Pulp Fiction, some people might try to make funny memes about the more edgy and out - there scenes that could be misconstrued as drug - related. But this movie is more about the intertwined lives of criminals in Los Angeles. Quentin Tarantino, the director, was aiming for a gritty and stylized portrayal of the underworld, not to encourage drug meme - making. So while some might find humor in making such memes, it doesn't really do justice to the overall artistic value of the film.
In 'Pulp Fiction', Vincent Vega and Jules Winnfield are involved with drugs to some extent, which could be considered as having 'drug dealer' - like activities. They work for Marsellus Wallace who has his hands in various illegal activities including drug - related ones.
It's most probably heroin. In the movie's setting and the kind of activities shown, heroin seems to be the drug in the shot. Plus, the way the characters talk about it gives that indication.
In Pulp Fiction, the drug scene is significant as it adds to the seedy and complex underworld atmosphere of the movie. It shows the characters' vices and the darker side of the world they inhabit.